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[USN-8137-1] Ruby vulnerability

Posted on 01 April 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8137-1
March 31, 2026

ruby2.3, ruby2.5, ruby2.7, ruby3.0, ruby3.2, ruby3.3 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Ruby could be made to expose sensitive information.

Software Description:
- ruby3.3: Object-oriented scripting language
- ruby3.2: Object-oriented scripting language
- ruby3.0: Object-oriented scripting language
- ruby2.7: Object-oriented scripting language
- ruby2.5: Object-oriented scripting language
- ruby2.3: Object-oriented scripting language

Details:

It was discovered that the Ruby URI gem did not properly handle sensitive
information when combining URIs. A remote attacker could possibly use this
issue to leak authentication credentials.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
libruby3.3 3.3.8-2ubuntu2.1
ruby3.3 3.3.8-2ubuntu2.1

Ubuntu 24.04 LTS
libruby3.2 3.2.3-1ubuntu0.24.04.7
ruby3.2 3.2.3-1ubuntu0.24.04.7

Ubuntu 22.04 LTS
libruby3.0 3.0.2-7ubuntu2.12
ruby3.0 3.0.2-7ubuntu2.12

Ubuntu 20.04 LTS
libruby2.7 2.7.0-5ubuntu1.18+esm4
Available with Ubuntu Pro
ruby2.7 2.7.0-5ubuntu1.18+esm4
Available with Ubuntu Pro

Ubuntu 18.04 LTS
libruby2.5 2.5.1-1ubuntu1.16+esm7
Available with Ubuntu Pro
ruby2.5 2.5.1-1ubuntu1.16+esm7
Available with Ubuntu Pro

Ubuntu 16.04 LTS
libruby2.3 2.3.1-2~ubuntu16.04.16+esm12
Available with Ubuntu Pro
ruby2.3 2.3.1-2~ubuntu16.04.16+esm12
Available with Ubuntu Pro
ruby2.3-tcltk 2.3.1-2~ubuntu16.04.16+esm12
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8137-1
CVE-2025-61594

Package Information:
https://launchpad.net/ubuntu/+source/ruby3.3/3.3.8-2ubuntu2.1
https://launchpad.net/ubuntu/+source/ruby3.2/3.2.3-1ubuntu0.24.04.7
https://launchpad.net/ubuntu/+source/ruby3.0/3.0.2-7ubuntu2.12

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